A Suffolk Police spokesman said: "As part of the ongoing enquiry, and as a precautionary measure in order to ensure some items found at the premises are safe, a controlled explosion is due to be carried out in the area.

"Police have already informed immediate neighbours about this action. A cordon remains in place and officers will remain on scene overnight."

Mr Arnold appeared before magistrates in Ipswich charged with two counts of assault and four counts of possession of a prohibited weapon.

A 45-year-old woman from the Stowmarket area, who was arrested on suspicion of possession of a prohibited firearm, has been bailed until May 21.